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3(omega) Power Balance Procedure on the NIF

Description: This document defines the detailed NIF full system shot procedure to obtain 8% power balance as specified by the SDR002 3.2.1.04. Because the 48 quads of the NIF will be set up over a period of five years, obtaining power balance will naturally be accomplished in two steps. First, as each quad is brought online, the four laser beams within each quad will be tuned by setting the PABTS splitter ratios so that each beam will give the same laser power on target during low energy square pulse shots.… more
Date: January 22, 2001
Creator: Glenzer, S.; Jones, O.; Speck, D. R.; Munro, D.; Lerche, R.; Salmon, T. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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3D HYDRA Simulations of NIF Targets

Description: The performance of NIF target designs is simulated in three dimensions using the HYDRA multiphysics radiation hydrodynamics code. In simulations of a cylindrical NIF hohlraum that include an imploding capsule, the motion of the wall material inside the hohlraum shows a high degree of axisymmetry. Laser radiation is able to propagate through the entrance hole for the required duration of the pulse. Gross hohlraum energetics in the simulation mirror the results from an axisymmetric simulation. A … more
Date: October 20, 2000
Creator: Marinak, M. M.; Kerbel, G. D.; Gentile, N. A.; Jones, O.; Pollaine, S.; Dittrich, T. R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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3D HYDRA simulations of NIF targets

Description: The performance of NIF target designs is simulated in three dimensions using the HYDRA multiphysics radiation hydrodynamics code. In simulations of a cylindrical NIF hohlraum that include an imploding capsule, all relevant hohlraum features and the detailed laser illumination pattern, the motion of the wall material inside the hohlraum shows a high degree of axisymmetry. Laser light is able to propagate through the entrance hole for the required duration of the pulse. Gross hohlraum energetics … more
Date: October 30, 2000
Creator: Marinak, M. M.; Kerbel, G. D.; Gentile, N. A.; Jones, O.; Munro, D.; Pollaine, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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3D Simulations of the NIF Indirect Drive Ignition Target Design

Description: The radiation hydrodynamics code Hydra is used to quantify the sensitivity of different NIF ignition point designs to several 3D effects. Each of the 48 NIF quads is included in the calculations and is allowed to have different power. With this model they studied the effect on imploded core symmetry of discrete laser spots (as opposed to idealized azimuthally-averaged rings) and random variations in laser power.
Date: January 5, 2010
Creator: Jones, O. S.; Milovich, J. L.; Callahan, D. A.; Edwards, M. J.; Landen, O. L.; Salmonson, J. D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Comparison of measured and calculated average void fraction in volume-boiling pools with inclined boundaries. [LMFBR]

Description: Accident analysis of an HCDA in an LMFBR often involves consideration and calculation of thermal hydraulic events related to boiling pools of fuel and steel mixtures in the disrupted core, as well as the subsequent motion of these two-phase mixtures out of the core. In many cases, the thermal-hydraulic state of the boiling fuel-steel or fuel pool may determine the initial or boundary conditions for subsequent calculations. Calculations of boundary heat losses are directly dependent on knowledge… more
Date: January 1, 1979
Creator: Greene, G. A.; Jones, O. C., Jr.; Abuaf, N. & Schwarz, C. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Condensation induced water hammer in steam generators

Description: The case of condensation induced water hammer in nuclear steam generators is summarized, including both feed ring-type and economizer-type geometries. A slug impact model is described and used to demonstrate the parametric dependence of the impact pressures on heat transfer rates, initial pressures, and relative initial slug and void lengths. The results of the parametric study are related also to the economizer geometry and a suggested alternative model is presented. The importance of concerns… more
Date: June 1, 1979
Creator: Jones, O.C. Jr.; Saha, P.; Wu, B.J.C. & Ginsberg, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Correlation of local heat flux from inclined volume-heated pools in bubbly flow

Description: Local and average heat transfer from volume-boiling pools in the two-phase bubbly flow regime to vertical and inclined flat boundaries were measured. The experimental technique and newly developed gold electroplated microthermocouples to make the measurements are described. A modification to the Boussinesq approximation for liquids is outlined which includes the effect of the average void fraction in a modified Rayleigh number. Heat transfer to vertical and inclined surfaces is correlated in a … more
Date: January 1, 1980
Creator: Greene, G. A.; Abuaf, N. & Jones, O. C., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Debris and Shrapnel Mitigation Procedure for NIF Experiments

Description: All experiments at the National Ignition Facility (NIF) will produce debris and shrapnel from vaporized, melted, or fragmented target/diagnostics components. For some experiments mitigation is needed to reduce the impact of debris and shrapnel on optics and diagnostics. The final optics, e.g., wedge focus lens, are protected by two layers of debris shields. There are 192 relatively thin (1-3 mm) disposable debris shields (DDS's) located in front of an equal number of thicker (10 mm) main debris… more
Date: September 4, 2007
Creator: Eder, D.; Koniges, A.; Landen, O.; Masters, N.; Fisher, A.; Jones, O. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Demonstration of Enhanced Radiation Drive in Hohlraums Made with High-Z Mixture "Cocktail" Wall Material

Description: We present results from experiments, numerical simulations and analytic modeling, demonstrating enhanced hohlraum performance. Care in the fabrication and handling of hohlraums with walls consisting of high-Z mixtures (cocktails) has led to our demonstration, for the first time, of a significant increase in radiation temperature compared to a pure Au hohlraum that is in agreement with predictions and is ascribable to reduced wall losses. This data suggests that a NIF ignition hohlraum made of a… more
Date: February 6, 2007
Creator: Schein, J; Jones, O; Rosen, M; Dewald, E; Glenzer, S; Gunther, J et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Demonstration of reduced radiation losses in hohlraums made from cocktail mixtures by measuring increased radiation temperatures

Description: We present results from experiments, numerical simulations, and analytic modeling that demonstrate enhanced radiation confinement of hohlraums made from cocktail materials. We summarize the results from several previous planar sample experiments that showed the potential promise of cocktails. We then discuss a series of more recent hohlraum experiments that attempted to demonstrate enhanced radiation confinement. Once we understood the importance of oxygen contamination in increasing the specif… more
Date: November 3, 2006
Creator: Jones, O.; Schein, J.; Rosen, M.; Suter, L.; Wallace, R.; Dewald, E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design Calculations For NIF Convergent Ablator Experiments

Description: The NIF convergent ablation tuning effort is underway. In the early experiments, we have discovered that the design code simulations over-predict the capsule implosion velocity and shock flash rhor, but under-predict the hohlraum x-ray flux measurements. The apparent inconsistency between the x-ray flux and radiography data implies that there are important unexplained aspects of the hohlraum and/or capsule behavior.
Date: October 25, 2011
Creator: Olson, R E; Hicks, D G; Meezan, N B; Callahan, D A; Landen, O L; Jones, O S et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of an electrical impedance computed tomographic two-phase flows analyzer. Annual technical report for program renewal

Description: This progress report details the theoretical development, numerical results, experimental design (mechanical), experimental design (electronic), and experimental results for the research program for the development of an electrical impedance computed tomographic two-phase flow analyzer.
Date: May 1, 1993
Creator: Jones, O. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of an electrical impedance computed tomographic two-phase flows analyzer. Final report

Description: This report summarizes the work on the research project on this cooperative program between DOE and Hitachi, Ltd. Major advances were made in the computational reconstruction of images from electrical excitation and response data with respect to existing capabilities reported in the literature. A demonstration is provided of the imaging of one or more circular objects within the measurement plane with demonstrated linear resolution of six parts in two hundred. At this point it can be said that … more
Date: August 1, 1998
Creator: Ovacik, L. & Jones, O.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of BNL Heat Transfer Facility 1: flashing experiments

Description: A major area of interest to reactor safety technology is the prediction of actual vapor generation rates under conditions of thermal nonequilibrium as would be encountered during a loss-of-coolant accident (LOCA) in a light water reactor. In support of the development of advanced codes dealing with LOCA induced flashing, analytical models of the nonequilibrium vapor generation processes of interest have been formulated, and an experimental facility has been constructed to provide data to verify… more
Date: January 1, 1979
Creator: Leonhardt, W.J.; Klein, J.H.; Zimmer, G.A.; Abuaf, N. & Jones, O.C. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A diamond detector for inertial confinement fusion X-ray bang-time measurements at the National Ignition Facility

Description: An instrument has been developed to measure X-ray bang-time for inertial confinement fusion capsules; the time interval between the start of the laser pulse and peak X-ray emission from the fuel core. The instrument comprises chemical vapor deposited polycrystalline diamond photoconductive X-ray detectors with highly ordered pyrolytic graphite X-ray monochromator crystals at the input. Capsule bang-time can be measured in the presence of relatively high thermal and hard X-ray background compone… more
Date: November 9, 2010
Creator: MacPhee, A. G.; Brown, C.; Burns, S.; Celeste, J.; Glenzer, S. H.; Hey, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Enchanced hohlraum radiation drive through reduction of wall losses with high-Z mixture "cocktail" wall materials

Description: We present results from experiments, numerical simulations and analytic modeling, demonstrating enhanced hohlraum performance. Care in the fabrication and handling of hohlraums with walls consisting of high-Z mixtures (cocktails) has led to our demonstration, for the first time, of a significant increase in radiation temperature (up to +7eV at 300 eV) compared to a pure Au hohlraum, in agreement with predictions and ascribable to reduced wall losses. The data extrapolated to full NIF suggest we… more
Date: May 17, 2006
Creator: Schein, J; Jones, O; Rosen, M; Dewald, E; Glenzer, S; Gunther, J et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Engineering Study of Water Injection in 14 Oil Reservoirs of North Louisiana

Description: Report issued by the Bureau of Mines over engineering studies of water injections in Louisiana oil reservoirs. As stated in the introduction, "this Bureau of Mines report presents operating practices and results of pressure maintenance and secondary recovery by water injection or by water injection supplemented by gas injection" (p. 1). This report includes tables, and maps.
Date: 1962
Creator: Meadows, Paul; Hawkins, Murphy E.; Weaver, L. K. & Jones, O. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of condensation-induced water hammer in preheat steam generators

Description: A review of Westinghouse 1/8-scale water hammer tests and data analysis was carried out. BNL has concluded that water hammers occurred in the feedwater line during many of the 1/8-scale tests. These events were probably caused by steam bubble entrapment and collapse in the partially-filled feedwater line. Recorded vessel pressure pulse activity under two-phase operating conditions was rare and, in those cases where pulses were recorded, the pressure pulse amplitudes were small. Either void coll… more
Date: September 1, 1980
Creator: Saha, P.; Ginsberg, T.; Wu, B.J.C. & Jones, O.C. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental measurement of local heat flux from volume-heated boiling pools to inclined boundaries

Description: The heat transfer characteristics of volume-heated boiling pools are of central importance in safety analysis of fast breeder reactors. The fluid dynamic characteristics, as well as the containability of such boiling systems depend intimately on the heat loads applied to the surrounding boundaries. Results from this work have demonstrated that local heat loads vary significantly from the average values reported in the early literature. This paper describes an experimental investigation of local… more
Date: January 1, 1979
Creator: Greene, G. A.; Abuaf, N. & Jones, O. C., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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